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Commitments and Contingent Liabilities Environmental (Details) $ in Millions | Jun. 30, 2019 USD ($)
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Loss Contingencies [Line Items] |  |
Accrual for Environmental Loss Contingencies | $ 357 |
Accrual for Environmental Loss Contingencies, Potential Exposure in Excess of Accrual | 725 |
Indemnification Assets | 200 |
Superfund Sites [Member] |  |
Loss Contingencies [Line Items] |  |
Accrual for Environmental Loss Contingencies | 49 |
Chemours [Member] | Indemnification Agreement [Member] | Superfund Sites [Member] |  |
Loss Contingencies [Line Items] |  |
Indemnification Assets | 30 |
Chemours related obligation subject to indemnification [Member] |  |
Loss Contingencies [Line Items] |  |
Accrual for Environmental Loss Contingencies | 169 | [1],[2]
Accrual for Environmental Loss Contingencies, Potential Exposure in Excess of Accrual | 380 |
Indemnification Assets | 169 |
Discontinued Operations [Member] |  |
Loss Contingencies [Line Items] |  |
Accrual for Environmental Loss Contingencies | 100 | [1]
Accrual for Environmental Loss Contingencies, Potential Exposure in Excess of Accrual | 228 |
Indemnification Assets | 0 |
Environmental remediation liabilities primarily related to DuPont - subject to indemnity from DuPont [Member] |  |
Loss Contingencies [Line Items] |  |
Accrual for Environmental Loss Contingencies | 31 |
Accrual for Environmental Loss Contingencies, Potential Exposure in Excess of Accrual | 63 |
Indemnification Assets | 31 |
Not subject to indemnification [Member] |  |
Loss Contingencies [Line Items] |  |
Accrual for Environmental Loss Contingencies | 57 |
Accrual for Environmental Loss Contingencies, Potential Exposure in Excess of Accrual | 54 |
Indemnification Assets | 0 |
DuPont de Nemours [Member] | DuPont de Nemours [Member] |  |
Loss Contingencies [Line Items] |  |
Stray liability threshold | $ 200 |
[1] | Represents liabilities that are subject the $200 million thresholds and sharing arrangements as discussed on page 38, under Corteva Separation Agreement.
[2] | The company has recorded an indemnification asset related to these accruals, including $30 million related to the Superfund sites.

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